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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script>
	function Person(name, age, job){
		
		//属性	
		this.name=name;
		
		this.age=age;
		
		this.job=job;
			
	};
	
	//方法
	if(typeof this.sayName != 'function'){
		
		person.prototype.sayName=function(){
			console.log(this.name);	
		}	
	}
	
	
	
</script>
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